-
Categories
-
Pharmaceutical Intermediates
-
Active Pharmaceutical Ingredients
-
Food Additives
- Industrial Coatings
- Agrochemicals
- Dyes and Pigments
- Surfactant
- Flavors and Fragrances
- Chemical Reagents
- Catalyst and Auxiliary
- Natural Products
- Inorganic Chemistry
-
Organic Chemistry
-
Biochemical Engineering
- Analytical Chemistry
- Cosmetic Ingredient
-
Pharmaceutical Intermediates
Promotion
ECHEMI Mall
Wholesale
Weekly Price
Exhibition
News
-
Trade Service
Pharmaceutical Network Industry Dynamics: The fennel is known as a seasonal product, "tree vegetables", not only rich in nutrition, but also has a high medicinal value Folks have "regular food fennel not infected" statement, modern medicine and clinical experience also shows that fennel can protect the liver, lung, spleen, blood, cramps and so on
Recently to the just season of edible fennel, balsamic, whether it is cold mix or cake, is very delicious Believe that also picked up a lot of people's appetite, conquering many people's taste buds
But do you know? Before the sale of incense, in fact, also need to go through the pre-quality testing, product production and packaging and other processes It is understood that, because the fennel contains a certain amount of nitrite content, testing personnel will generally use ultraviolet spectrophotometry method, ion chromatography and other detection equipment to complete nitrite content determination, to ensure that the listed fennel content is not exceeding the standard At present, the content of nitrite in the fennel on the market is about 1.4-7.5 mg/kg
In these devices that detect nitrite content, ion chromatography is a good separation of nitrates from nitrites, so that they are not disturbed, but the instrument is more expensive Another approach is the commonly used speclumine method, which is suitable for most laboratories, but has a long cycle and requires some experience The process of using ultraviolet speclumity is relatively simple and easy to operate
Studies have proved that, due to the particularity of the nitric acid content of the fennel itself, it is difficult to determine the content of nitrate in fennel by uv spectrophotosis However, by standard addition or by adding a certain amount of nitric acid solution to simulate the sample state of these two methods to eliminate this matrix interference, both simple and convenient, but also to ensure the accuracy of the data
In addition, it is reported that the fennel leaf extract contains the active ingredient - flavonoids, which is an ingredient with many benefits, such as anti-aging, treatment of cardiovascular disease, hypoglycemia, anti-cancer and other effects Therefore, the study of flavonoids in fennel leaves has attracted much attention The methods include ultraviolet spectrophotosis, high-efficiency liquid chromatography, high-efficiency liquid chromatography and so on Among them, the high-efficiency liquid chromatography method is used to determine the composition of the flavonoid monomer, while the ultraviolet spectrophotosis method is used to determine the total flavonoid content
At the same time, testing personnel also need to pass fluorescent photometers and temperament instruments and other equipment to detect the presence of pesticide residues in fennel, there is no heavy metal contamination and other issues, to ensure that the quality of the fennel qualified
It is understood that some in the industrial waste water flow through the grassland, the street growth on both sides of the wild vegetables, due to sewage, automobile exhaust and other pollution, resulting in mercury, lead and other heavy metals and other harmful substances high content, it is recommended to love "yu" to the regular channels through quality testing to buy, do not pick vegetables to unknown routes
The industry said that the above mentioned testing equipment requirements are relatively high, domestic institutions are mostly imported precision equipment, because of product quality and safety issues, the need to ensure the accuracy and stability of data, but also to avoid errors or risks
In recent years, with the gradual maturity of domestic pharmaceutical equipment technology, especially some domestic enterprises to introduce and absorb foreign technology, the industry believes that the future of such equipment to domestic pharmaceutical equipment open space is actually very large "Domestic enterprises with price advantages, strength and independent innovation ability of pharmaceutical equipment enterprises can seize the opportunity to strengthen research and development innovation, as soon as possible to achieve import substitution "